After performing leak detection for property we found that this unit had 2 leaks on the drain system both being in the full bathroom. First leak being due to a broken drain inside the wall for the bathroom sink, and the other being due to a bad seal for the toilet. Opened drywall and replaced approximately 4’ of damaged/cracked cast iron drain for sink and installed new P trap assembly. Also pulled and replaced wax ring for toilet. After pulling toilet we noticed existing toilet flange was extremely low and about 2” below the floor when the flange should be level or on top of existing flooring. I believe the wax rings failed due to this and strongly recommend replacing existing toilet flange and raising to proper height to avoid future issues.